Love this. Marketing is going to be critical to your success - it's a one-off, low-cost transaction that people rarely need, and you're competing against the keycutting booths in supermarkets that people see at least once a week.

But you've got great novelty. Perhaps create a theme around the idea that you're harnessing CIA technology (well, they've definiely done something similar at some point in the last 50 years). That's likely to get you a decent amount of mileage in the media, and make you stick in people's minds.